If all your fuses are fine, then my vote is MainRelay.

put the car in "on" position (dash lights = on)

listen for your fuel pump to cut off, (*click*)

if this doesn't happen, then take the relay out, and tap it on the ground. Occasionally they'll jam up internally.

there is a way to test it out with a multi-meter and a battery, i forget the exact pin numbers though. (sorry)

-jonathan